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Humans, or human beings, are classified by biologists as [[primates]] belonging to the mammalian species, [[Homo]] sapiens (Latin: "wise man" or "knowing man") in the family Hominidae (the great apes). Humans have possibly been around in anatomically modern form for approximately 130,000 years<ref>Alemseged Z, Coppens Y, Geraads D (2002). "Hominid cranium from Omo: Description and taxonomy of Omo-323-1976-896". Am J Phys Anthropol 117 (2): 103-12.</ref>. Humans have a highly developed brain capable of abstract reasoning, language, and introspection. This mental capability, combined with an erect body carriage that frees their upper limbs for manipulating objects, has allowed humans to make far greater use of tools than any other species. Humans now inhabit every continent including [[Antarctica]], with a total population of over 6.5 billion as of 2007.
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== The Origins of Man==
 
== The Origins of Man==
  
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